Headset



FIG. 1 is a front perspective view of a headset;

FIG. 2 is a back perspective view of the headset;

FIG. 3 is a left elevational view thereof;

FIG. 4 is a right elevational view thereof;

FIG. 5 is a front elevational view thereof;

FIG. 6 is a back elevational view thereof;

FIG. 7 is a top plan view thereof; and,

FIG. 8 is a bottom plan view thereof.

The broken lines form no part of the claimed design. 

We claim the ornamental design for a headset, as shown and described. 